I have determined that my transmission is bad through a painful process of replacing the differential gears and transfer case, something in the transmission has gone bad where it feels like gears are not in sync or something, not sure and at this point I am thinking it maybe less expensive to replace it with a used one. Well through the process of trying to find a replacement I learned that their are many different ones and one of the major things that is hurting my search is California emissions vs federal, I have California emissions and it seems that their are many more federal emission transmissions available. My question to anybody with some knowledge on this is, will a federal emissions transmission work in a California emissions car? Can I get it reprogrammed? Does the transmission require reprogramming in the whether you replace it with federal or California emissions? I would appreciate any advice or information to enlighten me in this matter, I do not want order the wrong transmission, but if I can make the federal version work I would have more options.